2AZNX-MODELZBLUETOOTH HEADPHONE

DATE 2021/04/26 Equipment Autoris ation Division F ederal Communications Commission 7435 Oakland Mills Road Co lumbia, MD 21046 FCC ID: 2AZNX-MODELZ Product Name: BLUETOOTH HEADPHONE Request for Confidentiality Pursuant t o Sections 0.457 and 0.459 of the commission's rules, we hereby request that t he following documents be held confidential: (List here the documents for which you are seeking confidentiality - for example ...) • Schematics • Block diagram • Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signatu re> t\_ \屯�(产 产 Name Allen Title Majordomo Company YOWU ELECTRONIC LTD.

Model NO.: MODEL Z

Model NO.: MODEL Z

RF Exposure Evaluation Statement 1.1 RF Exposure Compliance Requirement 1.1.1 Standard Requirement According to KDB447498D01 General RF Exposure Guidance v06 Standalone SAR test exclusion considerations Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or bod y and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Exclusion Threshold condition, listed below, is satisfied. 1.1. 2 Limits The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation 17 The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion 1.1.3 EUT RF Exposure Operational Mode: BDR （GFSK worst case） Channel Maximum Peak Conducted Output Power (dBm) Tune up tolerance (dB) Maximum tune-up Power Calculated value Exclusion threshold (dBm) (mW) 2402MHz 2.04 ±1 3.04 2.01 0.62 3.0 2441MHz 3.81 ±1 4.81 3.03 0.95 2480MHz 4.40 ±1 5.40 3.47 1.09 Operational Mode: BLE（worst case） 3.0 2402MHz 6.75 ±1 7.75 5.96 1.85 2442MHz 7.20 ±1 8.20 6.61 2.06 2480MHz 7.50 ±1 8.50 7.08 2.23 Conclusion: the calculated value ≤3.0, SAR is exempted.

Page 1 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Add: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TEST REPORT Product Name : BLUETOOTH HEADPHONE Brand Mark : YOWU Model No. : MODELZ Extension Model : MODEL Z FOX, 3G, 3S Report Number : BLA-EMC-202104-A1702 Date of Sample Receipt : 2021/4/13 Date of Test : 2021/4/13 to 2021/4/27 Date of Issue : 2021/4/29 FCC ID : 2AZNX-MODELZ Test Standard : 47 CFR Part 15, Subpart C 15.247 Test Result : Pass Prepared for: YOWU ELECTRONIC LTD. 3/F, Building 1, No. 400 Fangchun Road, China (Shanghai) Pilot Free Trade Zone Prepared by: BlueAsia of Technical Services(Shenzhen) Co.,Ltd. Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China TEL: +86-755-23059481 Compiled by: Review by: Approved by: Date: 2021/4/29 Report No.: BLA-EMC-202104-A1702 Page 2 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com REPORT REVISE RECORD Version No. Date Description 00 2021/4/27 Original 01 2021/4/29 Change the model Report No.: BLA-EMC-202104-A1702 Page 3 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TABLE OF CONTENTS 1 TEST SUMMARY ........................................................................................................................................5 2 GENERAL INFORMATION .........................................................................................................................6 3 GENERAL DESCRIPTION OF E.U.T. .........................................................................................................6 4 TEST ENVIRONMENT ................................................................................................................................7 5 TEST MODE ................................................................................................................................................7 6 MEASUREMENT UNCERTAINTY ..............................................................................................................7 7 DESCRIPTION OF SUPPORT UNIT...........................................................................................................8 8 LABORATORY LOCATION .........................................................................................................................8 9 TEST INSTRUMENTS LIST ........................................................................................................................9 ANTENNA REQUIREMENT .............................................................................................................................. 13 CONCLUSION ...................................................................................................................................................................... 13 CONDUCTED BAND EDGES MEASUREMENT ............................................................................................. 14 LIMITS ............................................................................................................................................................................. 14 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................................... 14 TEST DATA ........................................................................................................................................................................ 14 CONDUCTED SPURIOUS EMISSIONS ........................................................................................................... 15 LIMITS ............................................................................................................................................................................. 15 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................................... 15 TEST DATA ........................................................................................................................................................................ 15 DWELL TIME..................................................................................................................................................... 16 LIMITS ............................................................................................................................................................................. 16 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................................... 16 TEST DATA ........................................................................................................................................................................ 16 HOPPING CHANNEL NUMBER ....................................................................................................................... 17 LIMITS ............................................................................................................................................................................. 17 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................................... 17 TEST DATA ........................................................................................................................................................................ 17 RADIATED SPURIOUS EMISSIONS ............................................................................................................... 18 LIMITS ....................................................................................................…

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Report No.: BLA-EMC-202104-A1702 Page 46 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Power NVNT 1-DH1 2480MHz Ant1 Power NVNT 2-DH1 2402MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 47 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Power NVNT 2-DH1 2441MHz Ant1 Power NVNT 2-DH1 2480MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 48 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Power NVNT 3-DH1 2402MHz Ant1 Power NVNT 3-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 49 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Power NVNT 3-DH1 2480MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 50 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com -20dB Bandwidth Condition Mode Frequency (MHz) Antenna -20 dB Bandwidth (MHz) Limit -20 dB Bandwidth (MHz) Verdict NVNT 1-DH1 2402 Ant1 0.896 0 Pass NVNT 1-DH1 2441 Ant1 1.141 0 Pass NVNT 1-DH1 2480 Ant1 0.928 0 Pass NVNT 2-DH1 2402 Ant1 1.198 0 Pass NVNT 2-DH1 2441 Ant1 1.215 0 Pass NVNT 2-DH1 2480 Ant1 1.213 0 Pass NVNT 3-DH1 2402 Ant1 1.202 0 Pass NVNT 3-DH1 2441 Ant1 1.203 0 Pass NVNT 3-DH1 2480 Ant1 1.184 0 Pass -20dB Bandwidth NVNT 1-DH1 2402MHz Ant1 -20dB Bandwidth NVNT 1-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 51 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com -20dB Bandwidth NVNT 1-DH1 2480MHz Ant1 -20dB Bandwidth NVNT 2-DH1 2402MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 52 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com -20dB Bandwidth NVNT 2-DH1 2441MHz Ant1 -20dB Bandwidth NVNT 2-DH1 2480MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 53 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com -20dB Bandwidth NVNT 3-DH1 2402MHz Ant1 -20dB Bandwidth NVNT 3-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 54 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com -20dB Bandwidth NVNT 3-DH1 2480MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 55 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Carrier Frequencies Separation Condition Mode Antenna Hopping Freq1 (MHz) Hopping Freq2 (MHz) HFS (MHz) Limit (MHz) Verdict NVNT 1-DH1 Ant1 2401.9915 2403.0175 1.026 0.025 Pass NVNT 2-DH1 Ant1 2441.074 2442.0595 0.9855 0.81 Pass NVNT 3-DH1 Ant1 2441.071 2441.9935 0.9225 0.802 Pass CFS NVNT 1-DH1 2402MHz Ant1 CFS NVNT 2-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 56 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com CFS NVNT 3-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 57 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Number of Hopping Channel Condition Mode Antenna Hopping Number Limit Verdict NVNT 1-DH1 Ant1 79 15 Pass NVNT 2-DH1 Ant1 79 15 Pass NVNT 3-DH1 Ant1 79 15 Pass Hopping No. NVNT 1-DH1 2402MHz Ant1 Hopping No. NVNT 2-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 58 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Hopping No. NVNT 3-DH1 2441MHz Ant1 Report No.: BLA-EMC-202104-A1702 Page 59 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Dwell Time Condition Mode Frequency (MHz) Antenna Pulse Time (ms) Total Dwell Time (ms) Burst Count Period Time (ms) Limit (ms) Verdict NVNT 1-DH1 2402 Ant1 0.383 119.879 313 31600 400 Pass NVNT 1-DH3 2441 Ant1 1.658 263.622 159 31600 400 Pass NVNT 1-DH5 2441 Ant1 2.907 311.049 107 31600 400 Pass Dwell NVNT 1-DH1 2402MHz Ant1 One Burst Dwell NVNT 1-DH1 2402MHz Ant1 Accumulated Report No.: BLA-EMC-202104-A1702 Page 60 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Dwell NVNT 1-DH3 2441MHz Ant1 One Burst Dwell NVNT 1-DH3 2441MHz Ant1 Accumulated Report No.: BLA-EMC-202104-A1702 Page 61 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Dwell NVNT 1-DH5 2441MHz Ant1 One Burst Dwell NVNT 1-DH5 2441MHz Ant1 Accumulated Report No.: BLA-EMC-202104-A1702 Page 62 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A1702 Page 63 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Band Edge Condition Mode Frequency (MHz) Antenna Hopping Mode Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH1 2402 Ant1 No-Hopping -56.62 -20 Pass NVNT 1-DH1 2480 Ant1 No-Hopping -59.69 -20 Pass NVNT 2-DH1 2402 Ant1 No-Hopping -53.18 -20 Pass NVNT 2-DH1 2480 Ant1 No-Hopping -54.84 -20 Pass NVNT 3-DH1 2402 Ant1 No-Hopping -53.17 -20 Pass NVNT 3-DH1 2480 Ant1 No-Hopping -56.93 -20 Pass Band Edge NVNT 1-DH1 2402MHz Ant1 No-Hopping Emission Band Edge NVNT 1-DH1 2480MHz Ant1 No-Hopping Emission Report No.: BLA-EMC-202104-A1702 Page 64 of83 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Band Edge NVNT 2-DH1 2402MHz Ant1 No-Hopping Emission Band Edge NVNT 2-DH1 2480MHz Ant1 No-Hopping Emission Report No.: BLA-EMC-202104-A1702 Page …

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Model NO.: MODEL Z Conducted Emissions at AC Power Line (150kHz-30MHz) Radiated Spurious Emissions